Gearing.



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GEARING. APPLICATION mm) JUNE 28, 1906.

923,71 1 I Patented June 1,1909.

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APPLICATION FILED JUNE 28, 1906.

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APPLICATION FILED JUNE 28, 1906.

Patented June 1, 1909.

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OTTO SCHAERER, OF STUTTGART, GERMANY.

GEARING.

To all whom it may concern:

Be it known that I, OTTO SOHAERER, subject of the King of Wiirtemberg, residing at Stuttgart, in the Kingdom of Wi'lrtemberg and German Empire, have invented certain new and useful Improvements in Gearing, of which the following is a full, clear, and exact description.

This invention relates to certain improvements in head-stocks for lathes and other metal working machinery, the object sought for being a head-stock in which all levers for adjusting the gears are pivoted in fixed bearings situated outside, so that the casing firmly closed by a cover can be made sound tight.

In the accompanying drawing one form of the head-stock according to the present invention is illustrated: Figure 1 being a front elevation, Fig. 2 a side elevation, Fig. 3 a plan, Fig. 4 a view of the interior from above partly in section, Fig. 5 a detail. Figs. 6 and 7 are plan views of the interior of the machine, certain adjustable parts being in different positions in the two figures. Figs. 8 and 9 are transverse sectional views on the lines XX and YY, respectively of Figs. 6 and 7.

The complete carrying out of the object indicated above involves necessarily an alteration in the'clutching devices for the cone gear, the principal one consisting in that the transmission of power from the intermediate shaft to the cone gear is effected by means of a wheel which together with its driving wheel can be moved parallel to the spindle of the lathe and at the same time swung in a plane per endicular thereto, in order to engage wit each different wheel of the cone gear. Moreover, the present invention embodies several other im rovements which shall be specifically set 'orth in the following description.

It would be, of course, possible to construct a head-stock that would meet the requirements indicated in the opening paragraph, by means of tooth-wheels engaging at their sides and not, as is preferable, at their circumferences. This kind of engagement, however, causes considerable wear of the gear wheels, especially when these have to be put frequently in or out of engagement. On the other hand the driving or driven cone wheels could also be subsequently fixed to their shaft by means of a key movable along this shaft; but it seems doubtful whether Specification of Letters Patent.

Application filed .rune'zs, 1906.

.means of screw rings 5 and 6.

Patented June 1, 1909.

Serial No. 323,792.

this construction would securely meet the .high requirements of our modern high-speed .lathes, besides involving great losses of power, as all wheels of the gear cone would have to be in permanent engagement.

In the head-stock illustrated in the accom panying drawing, which may be driven either by means of a belt from an electromotor or from an overhead transmission shaft, 1 is the casing closed at its upper side by a cover 2 screwed to it and serving as a guard.

3 and 4 are conical bushings adjustable by The bushings 3 and 4 support the spindle 7 of the headstock, rings 8 and 9 being provided for bearing the end thrust and ring 10 for adjusting the spindle 7.

Upon the spindle 7 gear wheels 11 and 12 are loosely mounted, the web of wheel 12 being prolonged and forming a sleeve upon which gear wheels 13, 14, 15, 16 and 1.7 are firmly secured by means of keys. Disk 18 keyed upon spindle 7 supports a friction ring 19, made up of two parts, which by means of key 20 and link 21 are driven outward. Key 22 and screw 23 serve for adjusting the two parts of ring 19.

24 is the movable part of a coupling device supporting a pin 25. This pin 25 supports one end of the link 21 by means of a mold or groove.

26 is a bushing keyed to the spindle 7 and supporting the movable coupling device 24 by means of a feather key.

Gear wheels 27 and 28 are made of one piece and are loosely mounted upon shaft 29. Driven gear wheel 27 meshes with wheel 13 and the driving wheel 28 meshes with wheel 11.

30 is a coupling secured to wheel 11 corresponding to coupling 24.

31 and 32 are blocks mounted in ring 33 and serving for displacement of coupling part 24. Ring 33 and lever 34 are connected by a shaft so that coupling part 24 may be moved along the spindle 7 by means of lever 34.

Gear wheel 35 is keyed upon the spindle 7 serving for transporting the support when making screw threads.

The driving pulley 36 is mounted loosely upon a bushing 37 coupled with the shaft 38 by means of a friction coupling, consisting of a friction-cone 39 keyed to the shaft 38 and of a system of levers 62 and 63, pivoted to the cone 39 which are adjusted by moving the sleeve 64. This coupling is entirely closed by acasing 69 in order to prevent accidents.

Ring 66 supported by an arm 57 and engaging with sleeve 64 by means of rollers serves for coupling or uncoupling the friction clutch 36, 38.

The shaft 38 is firmly connected with the wheels 40 or 39 mounted loosely upon it according to the displacement to the right or to the left of the coupling 41, the said Wheels being in engagement with the wheels 45 and 46 keyed upon the second motion shaft 47 of the head-stock. This adjustment is effected by the lever 42 through the medium of a shaft 43 and of the sliding piece 44, no swinging lever penetrating the headstock casing to the outside, which therefore is kept sound-tight. (See Fig. 2).

Power is transmitted from the shaft 47 to the sleeve 54 which with a longitudinal key is movable on that shaft, to which the wheel 55 is keyed, the sleeve being so arranged within a body 56 that the latter can be turned about the sleeve 54 and can be shifted along shaft 47. This bearing 56 which carries a shaft 56 on which is loosely mounted the intermediate wheel 57 meshing with the wheel 55 loosely embraces a guiding bar 53 (Fig. 5) which is held parallel to the shaft 47 by means of arms 57, 57 which are pivoted concentric to the shaft 47 on bushes 48 in the casing. lhis guiding bar 53 can be rotated around the shaft 47. Hence it follows that the wheels 55 and 57 can indeed be displaced along the shaft 47, and at the same time swung in a plane perpendicular thereto and therefore can be put in engagement with each of the wheels 14, 15, 16 or 17 of the intermediate cone gear on the spindle 7. The arms 50 are swung around by means of a gear-wheel 5 1 mounted inside the casing 1 of the head-stock upon a pin secured to the casing the said wheel 51 meshing with a toothed sector on the hub of one of these arms 50 (Fig. 2). Thus by shifting the lever 52 carried on the shaft of wheel 51 the bar 53 is displaced parallel and around the shaft 47.

For pushing the pair of wheels 55, 57 along the shaft 47 and bar a rack 58 is employed, (see Fig. 2) which by means of two lugs embraces a rib or flange of the sleeve 54 said flange covering a part of the circumference of the sleeve 54 so that it is held in engagement with the rack 58 independently of the position of the bar 53 or of the arms 50 which carries the shaft 53. This rack 58 is displaced lengthwise according to the desired gear ratio of the cone by means of a wheel 59, spindle 60 and hand-lever 61 (see also Fig. 3).

Having now fully described the nature of my invention, what I claim and desire to secure by Letters Patent of the United States is 1. In an all-gear head-stock, the combination with a gear cone, of a motion shaft, a sleeve adjustable thereon, intermeshing gears one of which is keyed on said shaft and ronnected to said sleeve, a bearing carried by said sleeve and on which the other of said gears is loosely mounted, a bar on which said bearing is movable parallel to said motion shaft, means for swinging said bar around said motion shaft and means for shift ing said bearing substantially as described.

2. In an all-gear head-stock, the Combine tion with a gear cone, of a motion. shaft, a sleeve adustable thereon, a gear wheel keyed thereon and connected to said sleeve, a second gear meshing with said first gear, a body on which the second gear is mounted loosely, a bar on which said body is 1110\:Ll)l6 parallel to the said motion shaft, arms pivotally mounted concentric to the motion shaft and holding said bar, means for swinging said arms around said motion shaft and means for shifting said body, substantially as described.

3. In an all-gear head-stock the combination with a gear cone of a motion shaft, a sleeve adjustable thereon, a gear keyed to said shaft and connected to said sleeve, a se ond gear meshing with said first gear, a body on which said second gear is loosely mounted, a bar on which said body is mounted, said bar being parallel to the motion. shaft, arms holding said bar and pivotally mounted concentric to the motion shaft, a casing a gear wheel mounted inside the casing, a toothed seetor on the hub of one of said arms with which said last named gear meshes, means for retating said gear and means for shifting said body substantially as described.

In witness whereof, I subscribe my signa ture, in presence of two witnesses.

OTTO SQ! l A E It Ell itnesses:

FERD. LINDENMEYER, ERNST ENTTENMANN. 

